This question already has an answer here:

I've seen this happening but haven't found any clear answers on what to do, i sent about $30 worth of coins to an address (im sure its correct) and its unconfirmed after about 12 hours. you can see the transaction here. Any Help????

merged by Murch Jun 7 '17 at 16:39

This question was merged with Why is my transaction not getting confirmed and what can I do about it? because it is an exact duplicate of that question.